For the new perl.org network I needed to buy a fiber media converter. I tried getting it from the reseller recommended by the network provider, but when it took +24 hours to hear from them (their office was closed because of a storm) only to be told I needed to talk to someone in a different office I gave up on them.
A bit more of poking around and I found pc connection. Their site is a bit better, the price was good and overnight shipping only $12. Best of all: They allowed me to give them money and order the darn thing. It even seems like they'll ship it over the weekend and I'll get it Monday.
I can't fathom how so many online stores manage to completely bungle something as basic as a shopping cart and a checkout procedure.
Amazon might be big, evil, online-WalMart, but it just works. Newegg has worked quite consistantly for me. I have to pay sales tax, but they still have good prices and I usually get my orders the next day even when just paying for ground shipping. (They are just outside Los Angeles).
 Transition Networks are great; I emailed to ask about the difference between the older and the newer models ("E-TBT-FRL-04(SC)-N" and "E-TBT-FRL-05(SC)") and they replied quickly with "Functionally, there is no difference between the two converters. They share the same features. We made some changes on the board that enables us to make the E-TBT-FRL-05(HT), which is the "High Temperature" version." Wee! Competent honest quick service. What a concept. I can't help but thinking their products must be great too.