What is is worth??

[kycat2007]

I looked at a lake lot yesterday and would love your opinions. I would say it is about 1/4 acre. It has a 1997 trailer on it. They say it is in good shape. It has a dock and a pontoon that comes with the purchase. The pontoon is a 97 or 99 I believe (whats it worth) 22 foot Party something or another. Good view of tht lake but not waterfront. I was wanting a camp that was wooked etc. but this one is not. They say the boat dock is about 1/4 mile away from the place.
They are asking $69,000 for it. I figure the lot would sell for $20-30,000 with a old shack on it. So is this 1997 trailer worth $20,000. Then the dock should be around $6000. is the Pontoon worth $5-6000?? I hate to put money into something that goes down in value but these places are hard to find in move in condition. I think if it were a house or cabin then ok but a trailer is different. What is your opinions?