The last few issues of RV Business Magazine have been talking about the unprecedented and unforeseen boom that the RV industry is seeing now. To quote Doug Gaeddert who runs Forest River for Berkshire Hathaway, "People who couldn't even spell 'RV' 6 months ago have decided that RVing is the perfect socially-distanced vacation."
Dealer inventories remain low because the factories can't keep up. Dealers don't want to sell everything because then they have nothing to show new buyers. Because the market has expanded with so many new buyers, industry experts expect this to continue thru 2021 into 2022, so I wouldn't expect any deals.
Good idea watching RV trader, I'll bet there are at least some folks that went out and bought a brand new RV for the first time and then decided they didn't like it and are selling it after one season...probably some good deals to be had there.
Also bear in mind that RV mfrs don't require their dealers to provide warranty service on units that weren't purchased at their dealership. This was an industry move about 10 years ago to discourage the online wholesalers and protect local dealerships. Laws that cover the auto industry about consumer warranties don't apply to RVs. Not saying this to discourage you from buying online, but know this about warranties going in.
Not sure where you are in Central PA but
Tom Schaeffer's RV Superstore in Shoemakersville is a high volume dealer, he's on PA 61 just south of I-78 (Cabela's exit). I've never shopped there personally (and I'm not affiliated with them) but always hear good things.