A short checklist.
CHECK THE NAME ITSELF
Spelling, exactly The extension Whether it is what you think it is
THE SPELLING POINT
Read it character by character. Similar names are easy to confuse.
CHECK WHAT IS INCLUDED
The domain only, or anything else Whether a website, content or accounts are included
USUALLY THE DOMAIN ONLY
Do not assume otherwise unless stated.
CHECK THE EXPIRY
When the registration next renews.
A name expiring soon means a renewal cost shortly after purchase.
CHECK ANY HISTORY
Whether the name was previously used, and for what.
A name previously used for spam carries problems that follow it.
CHECK FOR RIGHTS ISSUES
Whether the name resembles an established brand.
Buying such a name can lead to losing it.
CHECK WHAT YOU WILL PAY
The price, plus anything else shown.
CHECK YOUR ACCOUNT DETAILS
Accurate, for the transfer.
WHAT TO DO IF UNSURE
Ask before bidding. Not after.