Try not to give price,ring them and explain you need to view items that need cleaning if they are genuine they will let you go and view them.Try and get them to send picture too if they are genuine they will take the time to do this,more so if its other side of Newcastle or travelling involved.
If they don't put phone number send email explaining you need to speak to them to discuss the cleaning further,if they don't get back to you PRICESHOPPER.