going rate for kp Prpo esprit vintage gold transmitter

[nivlacf1]

been offered Ko propo esprit 2 vintage gold transmitter and receivers a nosram receiver 40mhz for £50. is this about the going rate for one of these? i know most are on 2.4ghz now but this will be temporary (to see if my lad prefers stick or pistol) and just wanted to make sure i am not pay way over the odds for it, thanks