Or if you're interested in getting an entire collection of either 1st edition or 2nd edition (including the 2.2 rules) you could buy the CD-ROMs from Far Future Enterprises (run by Marc Miller who used to do the Traveller stuff for GDW)
The CDs are US$35 each but include everything for that edition and I mean everything that was published by GDW.
Here's links to the contents (in PDF form)
1st edition
http://www.farfuture.net/Contents%20...rsion%2010.pdf
2.2 edition
http://www.farfuture.net/Contents%20...rsion%2022.pdf
The only hassle is that you'd have to wait for delivery.
http://www.farfuture.net/cdroms.html