What to price a 1970 Super Bird at my friend is getting in a multi car trade

I remember back in 88 a simple apartment complex in out town had a decent complete 69 Daytona always parked in front of it. That was at the start of the boom. I always hoped that guy was able to hold on to it until the market peaked so he could move out of that crappy apartment and buy a house outright with the money.At least now the housing market has also tanked along with the car market so a superbird will still trade for a house in some markets.