Children’s petrol powered go kart (Forest Mere GU30)

My boys have been saving up pocket/birthday money for a petrol powered go kart, they are doing quite well but remain some way off the price of a second hand petrol go-kart; they have been very excited about some of the offers on FaceBook Marketplace but unfortunately they got their hopes up only to find that they were a scam and we were very lucky not to loose their money. Having done some research, unfortunately it seems that scams associated with second hand go-karts are common place so I thought I would turn to Freegle to see whether anyone has a petrol go-kart that their children have grown out of that they would be happy to pass on. My boys are 7 and 10. With many thanks.