The RAC 200 satellite navigation is for sale NEW on the internet for only £99.99 with FREE postage.
Don't be taken in by the Ebay sellers who list it for more.
You will find on the RAC website a list of well known verified stores who sell the RAC 200. Only one of them accepts Paypal and for this you will find the cost is higher - probably to accommodate the commission that Paypal takes from the seller.
Basically speaking - who do you trust to sell you a good product with a real warranty?