"Beauty is in the eye of the beholder." It's been almost 15 years since we were TT shopping but we wanted a unit with no slides. The principal reason for this was our anticipated usage - long, cross-country trips lasting anywhere from 2 to 5 weeks. In the end our "short list" was narrowed down to 4 units - 2 Sunlines, a Coachmen and a Fleetwood product. None had slides and we bought the trailer in our signature as it was the shortest and lightest in the floor plan we wanted. Having said that, our unit is 101" wide so we don't miss the slides and have plenty of room to navigate around each other in the TT on foul weather days. Don't regret our choice one bit.
Harder to sell when the time comes? See the first sentence. SOMEBODY out there is going to be looking for a unit to use the same way we did.
Will our next TT have a slide? Don't know but if it does, one should do the trick. We'll still be doing cross-country but by then it will be me & DW only. OK, and maybe a dog......:R
Envisioning how you're going to use the TT is the key.