There are some sold boxed, complete Kenner ones that have sold between £250 - £350. Given it's Palitoy and wold be rarer and more desirable then I would be looking for more than that. Maybe a £400 reserve?
For anyone who collects vintage Star Wars toys from the UK Palitoy factory. Buy, sell, showcase and discuss all things Palitoy here. RULES: -When selling please state price. We recommend Paypal....
This excellent group might be worth a try as well? Run by a decent lot.