What can be done with this?

[Cycleops]

A local boy who has come to me previously for 'help' with his bike has now brought this which is frankly a bit of a mess as you can see. He says a car hit his derailleur and now he can't use it at all.
The one piece crankset BB has too much play. Wheel bearing cups loose but could be adjusted. I know what you're all going to say, best to take it to the scrap heap.
So, new (home used) frame (called a 'body' here) or another bike altogether?

 

[Dogtrousers]

Squirt of WD40 it'll be right as rain

 

[twentysix by twentyfive]

It'll still work for him if you can sort the gears. He's been living with the other issues I suspect. Turn it into single speed on the existing cassette??

 

[Cycleops]

You can in fact buy cheap derailleur here but I think maybe the dropout has suffered in the 'car crash' although might be able to straighten.
He's quite tall and it's a small frame plus 24" wheels so perhaps he ought to move to something bigger. The seat post has been welded into the frame and someone has also welded V mount posts onto the rear stays but one has fallen off.

 

[Cycleops]

He came around this afternoon and we decided I should get it rideable as a single speed. He'll try to sell it and then buy buy something like a 26" wheel MTB more suited to his size.
Thanks all.