because human are fickle bunch, they rather take a financial hit & worry about it later, as long as they can portray a certain outlook to people they dont know as long as ada gaya

dealer:
lowball price
takes care of entire process
has other inventory to sell to the customer with "deals" since they are trading in
damage on car is also considered minor

most importantly, dealer will take cars which are still under bank loan where as if an individual were to sell their car which is still owned by the bank, they will have to pay it off first. Although there is a way to sell to the other party with same bank, I believe it is a complicated process, not to mention finding an ideal buyer to even take on this tasks.

Not to mention when buying, human also lazy to do the work where as dealer can perform all of the work with a fee.

I've bought & sold 9 of my cars on my own, 1 was purchased from used car but with recommendation & was in rush to get one, cash buy anyway.

if your confident in the:
installation of the tint
quality & accuracy of the tint
accuracy of the device used to measure
competency of the user in conducting the measurement
spending more time & money to repeat the process

may retain windscreen & front door tint and power through the puspakom inspection

Thats why its just easier & hassle free to remove tint, I do my own buying & selling, thus I've removed tint multiple times.

Sewa cermin is not new, exist for decades...but now days is dead business as new tint rules for rear windows is relaxed. In past, JDM cars with privacy glass in rear all have to sewa to get inspection, now days no need. I sold me MPV with limo tint aka 100% no issue.

Bought 10cars all from inidividual
Sold 8 cars all to individual

I think the mafan one is your assumtions

Its literally peeling sticker off glass, could do it yourself if time permits.

My last MPV sold to buyer, he basically saw today, pay tomorrow so I had to rush to remove the tints, had to do it after work in the night inside basement parking.

Between seller & buyer, agree on the payment method before hand.

Bankers cheque:
Safest, as the funds HAVE to exist & paid to the bank, then the bank issues the cheque to the named/buyer. Thus from buyer perspective, its confirmed funds available unlike personal cheque. But some not so up-to-date people dont even know this exist, so as seller, they also not aware. Then you can ask them go inquire with their bank of choice about what is a bankers cheque.

If cash:
Agree on a meeting place, prefer bank ATM as immediately deposit into machine. However due to this being a manual & not immediate process, both party need agree this is done before or after JPJ.
Actual experience:
a) Buyer gave cash at ATM, I deposit into ATM. I give him keys & reg card immediately, so as seller I have the $, and as buyer took the valued property (altho from eyes of the insurer, you willingly gave your keys & property to others). I immediately go JPJ while he drives back to his state, once I thumbprint, I give him the slip and he can complete the transfer at any JPJ within 7 days. New owner details need match with what seller gave at form.
b) Buyer gave cash, I was surprised as back then I assumed he meant bank trx, never the less, we counted the cash in Tesco(?) at gombak IIRC... this was 2007-2009. As buyer he confident can do JPJ with runner (this was before thumbprint, just isi form last time) without me there.
c) Most recent, bought a vehile from foreign national, now this cant be done at UTC, must be JPJ branch. I upped my online limit, daily limit, FPX limit & ATM limit.....but somehow someway the damn bank still enforce the default limit. At this time I had to explain to seller, I am sorry I have the proof that credit increased but bank side dont reflect. We agreed, while in line at JPJ, we do first. He keeps the keys & reg card & car. We meet at closest bank to take out $ over the counter.
d) A fisherman's son came from Kedah to purchase my car on Sunday, I assuemed he will look at car Sunday, then Monday we go puspakom/JPJ la. Mana tau, we meet at restaurant, he have not even seen the car with his eyes, he already gave me cash in his bag. I was taken a back, I told him come lets see the car first, he was satisfied, we go Maybank bandar baru ampang & took the $. He drove back to Kedah. The car was KP plate anyway, I believe its Kedah plate?....not sure. It was an restomoded 80's car. Each nut & bolt changed, chassis full antirust done.

Bank transfer:
Easiest, just before your turn at the counter, trx the $.

Personally, as seller I will want get $ first, so I make it easy for buyer I portray & give them all the confidence in the car, they can test & even bring family/foreman come see.

The MPV I sold, he brough his friend & they did the famous unreel the seat belts to see signs of water/flood. I told him if he knows, then I will also know & I will clean it. Instead I lifted the big carpet, till can see chassis, I told him look how dusty it is... if flooded, it will be sqeeky clean haha.

if you need MC just to get perform a personal task, then this is time management problem.

Tak pe, we share useful things to all so everyone can benefit, but if one is more comfortable in their bubble, continue onwards to your path.

Then the best option for you is to continue buying using which ever method you had been using all these times.

Dont buy from direct owners