5/4/16: We are having difficult-to-diagnose database issues (because of peak season usage) and have turned off some of the site
to try to isolate the problem. If the currently active parts stay up, we will gradually turn more of the site back on.
We apologize for the difficulty this causes in this busy curriculum-trading season.
Never pay with a PayPal "Friend" payment -- this is a favorite scam tool because it removes buyer protection.
Check all buyers/sellers by going to their page. Beware banned users
and odd-sounding purchase requests/scams! Don't email us -- just be wise.
Don't send more money than you are prepared to lose to a new seller, or a seller without good ratings (unless you can independently verify them).
If in doubt, contact a seller by phone or try to verify their name/address on the web (scammers easily create PayPal accounts).