Brother, need some advice here. Just got a quotation and quote me 7900 for installing conceal piping inverter type
1 no of 2.5HP with 50ft
1 no of 2.0 with 50ft
2 nos of 1.0 with 20ft
2 no of 1.0 with 15ft
1 no of 1.0 with 10ft
Is the quotation reasonable?

I guess I look like a water fish to the contractor, below is the conversation between him and I:
C: how's your consideration of the offer?
I: I will engage other contractor to do the work for me.
C: why?
I: the price is quite high.
C: I propose that you installs back to back, I can re quote accordingly.
I: no need already.
C: May be we can negotiate the price.
I: no need already la. You cannot compete one.
C: how much is the offer?
I: 4 to 5k like that lor.
C: 4k impossible la, 5k plus may be can do la (WTF, want to cheat 3k at least on the first quote)
I: WA... Two to there k different wor....
C: previously what I quote is Hitachi brand piping, the highest end for the air con piping, may be we can use the middle range piping.
I: no need already la, I decided to install after I get the key.
C: don't decide first, let's compare the price, you give me his quotation then may be I can quote you cheaper leh, but you must let me installs for you la... Some more if do it later the finishing not nice one. (cilaka, can't cheat me this time and think of cheat me next time)
I: ok la, let's see how la... (impossible to let him do the work, big buaya)
C: ok, thanks

So guys, get more information from the forumers here, at least you have the bullets to nego with the contractor.

my house still under construction and he is the only can do the work before I can get the key. He is from sitiawan.

On going development at sitiawan by dkls, then the contractor is the only authorized contractor that can do the air con work for us... so I need to deal with the contractor if I need to installs the drain pipe and copper pipe during construction is on going.... otherwise I need to wait till I get the key after completion then only can installs the piping lo... My idea is to minimize the hacking work LO...

not dare to ask him to do the work for me LO... Told him I will use all inverter air con.... Then he quote a sky high price for me lo... Which can deduct 40% when he knew that he got no chance to earn my money...