I think it really depends on what unit size, resort, time of year, etc. We have a trip coming up where the Disney cash rack rate for the unit we have reserved works out to be $24.15/pt all in (so, including tax). Granted, this might be an unusual unit size/resort/date combination for which
DVC points are not very efficient. But it is a very real example. If this unit is eventually discounted, the per-point "value" will be even lower. For this resort and season, a 20% discount would not be unusual, though nothing is usual about this year, so the discount may never happen. If it does, the value would be more like $19.35
For me to rent that stay and incur the risks of a
DVC rental (no cancellations/changes, risk of an owner reneging, I carry the risk of a force majure closure, etc.) I would be willing to pay no more than $20 if Disney does not discount their rack rate, and maybe $16 or so if they do. The likely discounted rate is more than most brokers charge but only barely so and certainly not worth the hassle, so I didn't even bother looking.