What do you want the boat for?
You planning on using it or just trying to flip it for a quick buck?

Mine (84 Rider, pretty much identical) was in WAY worse shape than that when I got it.
Paid $1500 for mine. I'm into it for about $2500 right now and I have a boat that I can take to the lake and wakeboard with.

As I said, it depends what you want it for. If you wanna hit the lake, you will have to do some work and spend some $.
Don't let people discourage you too easily, almost anything is fixable if you have the time/know-how/money.
The biggest problem I can see you having is if the motor mount bolt are rotted-out (most-likely are). That's a deal breaker.
You wouldn't be able to use the boat without replacing those 2 main stringers.

If you're just gonna flip-it/part-it, there is definately some valuable stuff there. (Mainly the trailer as someone else mentioned.)
Transmission is valuable. Prop. Rudder. Drive-shaft. Etc. Etc.

I'd say if you can get it for less than $1000, you will be alright.

Just an FYI. That line running out the front is a fuel line. It looks like they were running it with a gas can in the front of the boat or something. (Maybe the stock fuel tank was damaged.)

The ski pole is most-likely polished aluminum. Mine is exactly the same size/shape and it's definately aluminum.