I think you will struggle to find one but tbh they don't really drop there money..........I love them and just ordered my rental one from Edgemere - roll on 24th Feb!!
Will be selling mine as soon as my horse is sold. Only got it in April and will be asking for only a few hundred pounds less than we paid. I loved it, so easy to use. Only selling as giving up horses for a bit due to pregnancy.
It took me ages to find mine and have never seen another advertised round here. I paid £2900 for mine, only used a few times, so at the time pretty much new sale price minus the VAT.