i found unboxing for U2515H, but its in chinese. but the pictures look promising
http://tieba.baidu.com/p/3465962123?see_lz=1&pn=1
rule of thumb for 2nd hand things, usually reduce the price abt 15-25% depending on how old and how fast it depreciates. since its monitor, and provided with 5 year warranty, i think reduce abt 15% off the SRP you bought and see how well people find it?

throw it inside GS, this monitor is quite in high demand even for 2nd hand units. i might even buy yours if youre not from East Msia, the shipping would kill me
RM100 more only? there are 2 variant of U2713, the H and HM. H version is said to have been colour calibrated to industry standards.

take your time to read these reviews
https://pcmonitors.info/reviews/dell-u2713h/
https://pcmonitors.info/reviews/dell-u2713hm/
https://pcmonitors.info/dell/dell-u2715h-a-slick-wqhd-model/

generally, Dell name their monitors as
U = Ultrasharp series
27 = monitor size
15 = 2015, what else
H/HM = not so sure for this, but M version so far are "less premium"

those with 13 at the backs, are year 2013 models

theyre not the newest, either the salesman is pushing off stock, or thats the latest one they got

not every store have the 2015 revisions btw
arb how many year warranty? ill say pay the extra RM300 for the 3-5 years warranty. Dell have a good track record of after sales service, so its definitely worth the money

If I'm not wrong,both U2713H and U2713HM are not the latest models. The latest models line would be Dell UP2715L , U3415W , U2515H , U2715H ,P2415Q and P2715Q. Someone do correct me if I'm wrong.

spec-wise both are similar, with the exception U2713H have the better colour reproduction compared to the U2715H (it comes factory calibrated to industry standards)

they both have USB3.0 ports, uses HDMI and Display Ports, pretty much similar too

design wise, the U2715H is the one with slim bezel. so if its your thing, go for it.

yeah, really like the slim bezel design. but beside this, if you want know any other different, below are the highlight:
U2715H vs. U2713HM

Color Gamut:
CIE1976 - 91% vs. 82%
CIE1931 - 76% vs. 72%

Panel
6 bits vs. 8 bits

and of course the connectivity for U2715H are different also, which is no more DVI and VGA but add DisplayPort out; and add extra 1 more USB port.

some older model still have better panel than U2715H such as U2713H, but much more expensive.

10 bits panel monitor, but extremely expensive. UP2715K, U3014, UP3214Q 
llk just realize U2713H have huge discount if compare with launching price.

bro i not rich lah..

maybe I didn't have commitment like you

thats why I can afford it.

U2713H is really good in color gamut, guarantee for those doing photo editing will satisfied, the accuracy are perfect. if you're 100% purely on gaming and your expectation are high on gaming, not to say the responsive are really bad but I don't think neither U2715H or U2713H are perfect for you.

How much U2715H?

I think the performance for gaming on par with 1st gen E-ips

Btw I pick U2713H because of the monitor got DVI port.. My gc didnt have displayport.

Thanks for the recommendation. In future I will pick Dell, Samsung or LG.

No more ViewSonic for me and I will not recommended this brand to anyone anymore.

I am shock and very satisfied with it service level.

Thanks for this information, now everybody knows how bad the ViewSonic service are! How could they charging us and so deep expensive some more.

I just get feedback from ViewSonic Facebook official site. I hope it can be solve out.

See what solution they give.

i mean the quota is 10, sold out within 5 mins ....

damn i hate samsung is gearing so fast, not even 1yr with qd-oled here it comes the updated version.

got a, ASUS PG32UCDP and LG 32GS95UE
former costs a bomb, latter can go <5.5k when timing is right still too expensive though