PayPal Is Fine
Just use a major credit card so if something really goes wrong you can contact them to sort things out. PayPal does offer a "buyer protection" program but does not promise a full refund.
Being taken on shipping charges? Ohh yes!
Some sellers are fine, others ask for say $10 for shipping and the package arrives with only $4 postage. Not only that they use either any cheap beat up box they had/found lying around, or free postal service boxes. This means their cost of shipping was about nil, though one seller I called out on this told me I had to pay for his gas to the post office. When I pointed out gas as well as shipping supplies are supposed to be covered under costs of doing business, and recouped from sale proceeds, he got miffed. It's not my fault his tired old tat isn't bringing in millions.
To really cover your bases, look for auctions that have a shipping caculator included. One inputs one's postal/zip code and up comes various methods of shipping and costs. This way you know up front what is what.
Launderess