How long should I wait for combined shipping?

I bought a couple of items and the seller advertised them as a certain price for shipping, plus $1 extra per item. So, I bought more than one item and I asked for the total. I got no results, so after three days I actually sent an ebay message. Still no response. It has been almost a week. Should I just pay the full shipping and leave negative feedback, or should I just keep waiting and waiting and waiting? It's only a couple of bucks, but it is MY couple of bucks.
Successful dealings with shootybabitt, LarryP, Doctor K, thedutymon, billsgridirongreats, fattymacs, shagrotn77, pclpads, JMDVM, gumbyfan, itzagoner, rexvos, al032184, gregm13, californiacards3, mccardguy1, BigDaddyBowman, bigreddog, bobbyw8469, burke23, detroitfan2, drewsef, jeff8877, markmac, Goldlabels, swartz1, blee1, EarlsWorld, gseaman25, kcballboy, jimrad, leadoff4, weinhold, Mphilking, milbroco, msassin, meteoriteguy, rbeaton and gameusedhoop.
0
Comments
-CDs Nuts, 1/20/14
*1956 Topps baseball- 97.4% complete, 7.24 GPA
*Clemente basic set: 85.0% complete, 7.89 GPA
You know what the total is so why don't you adjust the invoice and send the correct amount. There should be something near the bottom total area to add or subtract an amount from the invoice. If you can't adjust the invoice then use the send money to send him the correct amount and reference the Ebay items.
Collecting 1970s Topps baseball wax, rack and cello packs, as well as PCGS graded Half Cents, Large Cents, Two Cent pieces and Three Cent Silver pieces.
Lou Gehrig Master Set
Non-Registry Collection
Game Used Cards Collection
<< <i>If it were me, I would keep waiting- and if the seller filed an NPB on me I would respond to the case by informing EBay that I will promptly pay for my items as soon as the seller adheres to his own stated terms re:combined shipping. >>
"If I ever decided to do a book, I've already got the title-The Bases Were Loaded and So Was I"-Jim Fregosi