A lot of sellers will not accept PayPal for large purchases because of fees and/or disputes. What is to keep the buyer from opening a dispute. Cash in hand, bank transfer but once it's transferred it's gone or possibly an escrow service. Best advice is get to know who you are buying from and check out the reputation of the seller. Also PayPal places a hold on the money which can be a pain for a seller of they are looking to turn around and purchase something else.