Joking apart; things such as the plastic fuel pipe and plastic fuel filters with joints held together with ty-wraps, (aka zip ties); pieces of aluminium angle, but what type of aluminium - what alloy, i.e what strength and resilience does it have in an aircraft environment - or is it just from B&Q, (no disrespect to B&Q). Ditto, what is the specification of all the bolts ?
You simply don't know, so honestly, I would run a mile from that and NEVER fly yourself in it. You could possibly use it for parts to make a large radio controlled model of some sort, but only pay a few hundred for it at most.
I remember reading an accident report where a similar craft had used plastic fuel pipe which had become compromised by shrinking in the lower temperatures aloft, causing fuel starvation and a serious problem.
Just don't go there.