You can use PayPal virtual terminal for this.
Basically, this allows you to take visa/mastercard/debit card payments over the phone, fax or mail.
You dont need a PDQ machine or anything like that, you just log in to your virtual terminal from your PC.
https://www.paypal.com/uk/cgi-bin/webscr?cmd=_vt_hub-outsideThe fees are:
£20 per month + 3.4% of the transaction + 20p per transaction
So for example a £15 house would cost 71p in fees (plus the £20 per month)
If you already have PayPal website payments pro, then its free.