i purchased mine from Ebay, from a UK seller, was £163, but given I was hit with import charge last time..didnt mind paying a little more..but I got it next day too.
mine came rooted(seen the vast majority are rooted but ask the seller first) has the play store too & google apps(had to download a couple but no trouble)
not tried the GPS but given its rooted if theres a problem I suspect it should be easy to fix if anything is wrong.
Well I think it's an improvement over the G3,screen seems brighter & generally overall seems an improvement over the G3.
The JB on the G3S seems very good so far. Can't fault it so far(had it a week tomorrow). Responsive, fast and smooth. Only gripe is when you look on wifi, there's a NVRAM error which appears, doesn't affect the wifi tho.
On the whole getting one deal I wanted a G5, but that isn't out for a while they say, so the G3S is a very good alternative at a good price.
*selling my G3 on a certain auction site atm, best sell it while it's got a bit of value. :-)
i suspect that Jiayu might have slowed down production of the G3 due to the fact the G4 & G5 might be coming out within the next 2-6 months.
Also....I think the G3 is indefinably getting the JB update is all a matter of when & really not to rush it; as no one wants shoddy software, Also want to make the phone as appealing as possible after the launch debarkle.