Something of interest for you:

"Through the subscription Web site SoldBoats.com I found 39 Grand Banks
42s reported sold in the last six months in the U.S. alone. Selling
prices ranged from $30,000 for a 1967 model to $585,000 for a 2001
model. On the lower end of the price scale are 1973 and earlier models
of wood construction. These models may offer very attractive savings
but this can be quickly offset by the added cost of maintenance and
upkeep. A good rule of thumb is to anticipate an average "added cost"
of at least $100 per-foot for maintaining an older wooden boat in good
condition."

(From the BoatUS website)