I'd hop on that. like you said look for the usual maintenance things. and only 98K on a 1999? Not bad. I sold my 98 f150 with 140K on it and it ran great still. I think you might have a gem on your hands. I've always heard to look around at the interior and you can tell if the previous owner was someone who took care of it. If they took care of the interior, they most likely kept it current maintenance wise too.
JVC Arsenal KD, Bilstein 5100 adjustables [maxed], aFe Stage 2 Air Intake, Superchips 3865, Husky Floor Mats, Saddleman Camo Seat Covers, Flowmaster 40 Series Muffler SI/DO, 20 % Tint. 35x12.5x17 Federal Couragia M/T, 17x8.5 VTEC Warlord wheels, -12mm offest.