[Slixtiesix]

I have observed Hasselblad used prices, both in Europa and the US, for about a year now because I wanted a nice 501cm or 503cw. They still go for a lot of money. Mint 501cm cameras were still demanding around 1000 Euro, 1500 if they were sold as kit. 503cw were about 1200 Euro, 1800 or even more as a kit. One can save about 200 Euro in average when buying on Ebay, but it is always a bit of roulette there.
Occasionally I also had a look on older models like 500c and 500cm and even these demand about 500 Euro when in good shape and working order. I finally ended up buying a very nice and hardly used 555ELD. These go for around 700 now. The motorized models, even late ones, are cheaper in general than the manual models of the same era. The older ones like 500EL and ELM are pretty cheap now, but they have been so for a while.

Regarding lenses, it really depends on the specific lens you are looking for. Pre FLE 50mm, 80mm and 150mm are the best bargains. The 180mm is still expensive but even this one has come down a bit.
The 100mm is still commanding insane prices. I have seen two mint 100mm CFi lenses changing the owner for 1800 Euro recently. Even ones that look quite used are commanding 1200-1400. 100mm CF can be had under 1000, sometimes even less if one has luck.
I have the general feeling that CF lenses have come down a bit, while CFi lenses are quite stable. The only exception being the 150mm CFi. I have seen this for 600-800 Euro several times now.
The CB lenses are quite cheap. 80mm CB is regularly sold for around 300. 60mm is around 400-500. The 160mm can be had quite cheap on Ebay. Have seen it selling for 300 Euro. Dealers do demand much more.
The SWC does still command a premium. Even very old models. Old SWC usually goes for 1500, SWC/M for 2000-2500, 903SWC 2500-3000, 905 SWC above 3000. Other lenses still expensive are the Superachromats and the 110/2 Planar, the latter usually sold for 1600 Euro in FE version.

To answer the original question in short: I also do not think prices rise or fall significantly. They are quite stable. Items that were expensive when new are still relatively expensive. Others that were more affordable, like the CB series, are cheaper. It more depends on the specific buyer and how much he is willing to spent in my impression. The most important thing if you are looking for specific items in nice shape is patience!