not true. sr5's are going for a decent price right now. it might also be a sedan though. there are a few body kits I have come across for the ae92. there are 3 different styles of stock for bumpers and marker lights. Zenki, Kouki, and the US style. there are 2 different engines for the ae92 for 1988. the 4af and the 4age. if it's an sr5 or a sedan it's the 4af, unless it was swapped. If it's a gts it will have the 4age. The 4af is more torquy then the 4age for the power it puts out so if your looking for torque turn the 4af if your looking for hp go for 4age. there are different engines that are common mods for an ae92. 1988 would have the big port 4age and 1990 up has the small port. difference in power come with that and the lack of tvis on the small port. there's also the 4agze (super charged 4age with stronger internals) and the 20v 4age's the silver top and the black top's.
the 4af is carbed and some will go to the 4afe (has efi) which came out in the sr5 and sedans mid 1989.
you can do camshafts pistions, just about anything for internals if your willing to put the money into it (which I don't think you want to since you spoke of selling it). turbo is another option.
other mods people do are suspension's. people tend to go for the gts suspension because it's beefier and stiffer stock than the suspension the sedan and the sr5 share. you can also change the springs and struts which is another VERY common mod with the ae92's
I think it's nice they are less common than civics
and I don't feel like typing anymore