It's a mustang. If you like it, buy it. Since it's a "low value coupe" you can make it into anything you want. If you're worried about future value, you're missing the point, IMO anyway. To me, a mustang, unless it's a rare and desirable option, is a base platform to be molded into the owner's vision. Buy it and let your imagination run wild.
1998 5.0, fitech efi, holley in tank returnless pump
4R70W transmission with USShift quick 2 controller
3.00:1 8" open rear end