All things are relevant, don't forget. To me, without seeing the boat, $3,000 is a lot for a '78 Spirit 21. This is a buyer's market, it's coming on winter in your area and the market is flush with available options. Take your time and go and look at several boats before you make this plunge. Also, you mentioned "1-4days...and possibly 4 people". That's gonna be a really, really, really tight time on the old waterfront there. Oh, I'm sure there's 4 places for people to lay down, but just wait until it's "teeth brushing time" or worse......good luck and keep us posted.