My weekly Aldi email has just informed me that next week they are
stocking wallchasers for 50 quid...
http://uk.aldi.com/special_buys/product_241.html

I don't believe it's going to be a wonderfully made and durable piece of
kit, but given that even the crappy Ferm model from Screwfix comes in at
130 quid, I think this has to be at least worth a looksee for those of
us who would use one only occasionally...

David