Buying new computer hardware and software isn't a particular challenge, except sorting through the maze of vendors, of which there are plenty.

However, I am increasingly drawn to pursue sources for end-of-line (still new, but recently dropped from current price lists; discontinued), refurbished and even used Mac and PC goods — both hardware and software — I am generally drawn to the following sources:

Other World Computing. Perhaps my most frequent source, particularly for memory, ZIF processor upgrades, storage and peripherals, such as PCI-based add-on cards. Based near Woodstock, Illinois. They even write their own software to help owners of pre-G3 Macs use OS X. Very reasonable shipping costs, too.

MacResQ. Recently merged with MacWorks of Kansas, this firm has a healthy supply of used and refurbished Macs. Stronger in hardware than software, but ample in both.

MegaMacs. Have just begun to use these folks, based out of Tulsa, Oklahoma. Some aggressive pricing on used hardware (at one time offered a LaserWriter Pro 630 for $229) and end-of-line software. Once e-mailed them about a table/design problem with their Website and immediately responded. Just alerted me that their site has been redone, looks clean and efficient. They even thanked me for this unsolicited link. Big, remote operations don't do that.

PowerMax. Seattle-based operation, from which I bought my primary home workstation, one of the original Beige G3 desktops. Have also bought some end-of-line software from them. Generally have a good selection of refurbished and used Mac CPUs and peripherals.

Smalldog. Very competitive online outlet from Vermont. Vendor for a lot of end-of-line and refurbed Macs. Perhaps the most reasonable with shipping charges on large items: once ordered an iMac for a friend, and they charged only $22 to ship it (Dell once charged me $95 to ship a lighter PC).

Surplus Computers. Used to be called Software and Stuff.

Computer Geeks. A very good tech source for PC parts, bare-bones systems, surplus and used supplies. Some Mac, but mostly PC.

Computer Surplus Outlet. A strong PC-based vendor, even sells operating-system releases of discontinued versions. Facility is in Las Vegas.

Andover Consulting: Surplus Liquidators. They claim to sell product to outfits like MacResQ, but individuals can buy direct from them as well. I haven't yet, but have bookmarked their site and watch it from time to time.

eBay. You're definitely on your own more buying from the motley array of sellers at eBay. But you can also do quite well if you ask the sellers good questions, get good answers and know when and how to bid. I've purchased both computer hardware and software from a variety of eBay sellers and my experiences have been generally good thus far.