If you're expressing interest in more than just one item:
1) Place your bids, and send me a message, asking for a combined invoice for everything. You can also request eBay for a total invoice. or 2) simply pay for everything together (the system will automatically overcharge you, but I will send you the difference back in a flash!).
If you live in Europe, I can also send bigger (and inexpensive) parcels via courier (DPD) to most European countries.