Not a foolish question at all. RVs in general do depreciate quite steeply in the first few years of ownership. However the good news is that molded fiberglass depreciates much less than most conventional trailers.
Reasons include high demand, low production, long wait times for new ones, and the lack of roof seams (and associated maintenance and leaks).
I would not speculate on what yours might be worth- there are still lots of variables: condition, layout and features, location, and season.
You can review the archives of sold
trailers here and at fiberglass-RV-4sale.com for other Lil Snoozys that have sold recently. Probably won't be many, but it should give you an idea what yours might be worth.