Used FG 'eggs' hold their value very well. Buying a used one means little to no loss of initial investment upon resale, but repairs often are necessary (repair/replace internal components, reseal windows
, fix door hinges, replace floors if there's been a leak)... the same as with any used trailer, only the egg's shell greatly reduces the number of potential leak entry points and eliminates roof/sidewall rot. If you're the handy sort and enjoy tinkering and fix-it projects, you will enjoy a used one more and can do the repairs more economically. Since you mention a 'winter project' I assume you are in this camp. Used ones do not come up all that frequently in any given region, so you would have to keep a sharp eye out and jump quickly on any that you find; they usually go fast.
Buying a new one involves a larger initial outlay, but it should need little additional outlay for several years and will still hold value better than its conventional counterparts. Also the egg will tow easier and use less gas than a stick trailer, of course... some small offset of investment there if you tow it a lot.
I would much more readily buy a used egg than a used stickie, because rot and mold can so easily be hiding in the walls of a stickie. For new, though, some of the small stickies have amazing prices... thus my purchase of the KZ Escape
(no relation to the egg Escape) this past spring for under $10K.
About the Snoozy door in back: some see it as an asset, some don't. It's less conventional seeming, for sure. Affects the possible floorplans. Can't add bikes or a genny to the bumper. But it's easy to get larger stuff in and out, making it possible to haul a kayak or bicycle. Two big pluses for the Snoozy would be the regular queen mattress and the relatively comfy (compared to most trailers) sofa design. One minus is the relative lack of upper storage cabinets... bend down to get almost everything.
The FG egg builders have expensive materials... FG resin is petroleum based. And they have to pay for expensive molds. The rounded shape means the cabinetry and stuff is more custom, which raises cost too. Stickie exteriors are slapped together in a matter of hours out of common, off-the-shelf materials and the interior finish can be quicker as well due to the square shapes of everything.
Will some of those staples loosen up on the rough roads? Quite possibly. Will an egg's shell loosen up on the same roads? Impossible. But the interior components can get beat up the same. Water lines can leak the same. Window and door seals can develop leaks
How did I get off on all this???