Just uninstalled v. 1.8.7, installed v. 1.8.8...unticked the ebay shortcuts box. No alarms sounded, no ebay shortcut installed.
Just uninstalled v. 1.8.8, reinstalled 1.8.7. No alarms sounded, no ebay shortcut installed.
Both versions put a file in the program folder called eBay_shortcuts_1016 dot exe. Scan w/ MBAM was negative, scan w/ Avast! was negative. If you click on it it installs that shortcut, but still no alarm. I just deleted it. Also the ebay shortcut from the desktop.
changelog from the authors page says
"Unlocker 1.8.8 - 26/10/2009
- Improved behavior: Improved the way DLLs are unloaded.
- Promotional feature: Added fully optional shortcuts to eBay during the installation. Simply untick "eBay shortcuts" in the choose components page during install if you do not wish to have those."
Guess its safe.

edit, 28 Oct: Not sure if v. 1.8.7 installs ebay or not. Couldn't restart, so it may have just not been removed. Doesn't matter much, just wanted to be accurate.