I had a similar issue just last month.
In November I shipped a package to Chile via first class mail as advertised with no tracking. It took two months to get there.
I ship internationally frequently as I find I get better bids from international people and I've never had an issue before (just sold my entire 140 item 12" collection and 2/3 of it was purchased by international bidders). Luckily this person was very patient and didn't get too cranky. But because of this issue I've decided not to ship any other way than Priority mail. I've made a few exceptions for shipping first class to Canada, but will not ship any other way internationally.
Hopefully that protects me when it comes to angry/unreasonable eBayers. It seemed to help on a recent shipment that was stuck in customs in Germany for a month. The tracking number showed the package made it to Germany and was sitting in a holding area, so the purchaser was able to direct his anger at the German postal service and not me.
If I could avoid eBay to clear out the extras in my collection I would. I just don't know of any great other options. I've only had tepid response from listing things on Craigslist.