I haven’t been on board since early
DVC, so I am only following what I’ve seen mostly the last few years. I’m basing my info strictly off of what the resale market is doing, so maybe that isn’t a great gauge.
For March 2022 Grand Floridian and Riviera were both available direct from Disney with promo discounts, on the resale market GF average sale for March was $172 and Riviera $151. Grand Floridian will expire 6 years earlier, so you get more years if you buy Riviera, but it sells for 15% less. I took that as the restrictions were having an impact on value.
With all that said I by︅ no means claim to be an expert, just voicing my opinion

I have 33 days booked in Disney over the next 12 months and if I wanted to sell after my trips I should get what I paid for my contracts, all my dues, and enough left over for a free trip next year. My one friend is trying to sell their Riviera because of where life has gone, and they will lose about 30% of what they paid and gotten one trip out of it.