Yamaha Waverunner Xl 800 Jetski

I purchased this leading up to the summer as I had high hopes of getting regular days out on lakes and sea, I haven't used it once and now ulez is coming around my area I need a new work van It's a 3 seater waverunner xl 800 got it from my cousin who said its like brand new I know very little about them to be honest, It comes with a trailer and it's got 18 hours on the clock, I got loads of all different size life jackets and a load of attachments ie rubber rings etc I dont know what year it is that's all on the paperwork which I still haven't collected I won't be giving it away I just want what I paid back 4k Cheers