Posted By:
Jeff SI frequently receive e-mails from a recent winning bidder that say: "I am going to be bidding on something of yours next week, may I wait until then to combine shipping?" Almost always as a question.
What you, as a seller, can do to avoid the 1.5 week lag from inconsiderate buyers is to insert a line into your item desc.:
"I would be happy to combine shipping on multiple item purchases within 3 days of each other, unless other arrangements are made." You set yourself up with a rule to point to if somebody pisses you off, but you also sound reasonable with the second half.