Meh. I dont know enough about mtn bikes but that is a good brand. The golf clubs and bag are probly worth & $100 at least for a good flip. Spalding irons not worth much. The drivers are a set but i cant make out the brand. I noticed no putter so thats a big miss. Putters and drivers are the costliest clubs. Guess it comes down to the bike and if its working. If it is its probably a good deal.
i would pass on both. Marin makes a good bike, but that is probably 12-15 years old and it's a hybrid road bike, not really a mountain bike. edit: looks to be the 1995 model, based on the color description http://www.bikepedia.com/quickbike/BikeSpecs.aspx?Year=1995&Brand=Marin&Model=Sausalito&Type=bike
Those golf clubs arent even worth the gas to go over your buddy's house to get. I don't that much about bikes, so no helpful info there.