You should buy the 2.5 and compare the two and post some numbers and differences you observe. Most people on here will tell you "2.5 hands down" but...
are they matched motors or are the powerheads on different mids/adapters. Cracks in the cowlings? factory plastic cowling or aftermarket fiberglass?...
Well a 280 powerhead in good condition will go for 6000 to 12000 depending on year , salt use , hours , and sport master s go for 2500-4000 depending...