I hope its ok for me to post this here - I know how much SN equipment can cost from reading posts on MN so thought this might be helpful to someone here 
A charity shop near to where I live has a Swifty Tendercare SN pushchair for sale, it appears to be in excellent condition, for £100.
I don't want to say exactly where I live, but if anyone wants to PM me I can give them the details of the shop.