I hear ya, ddev. I don't like to spend $ needlessly either, though I think some things are worth an extra bit... the key is that when you're a beginner, it's tough to know what is a ripoff and what really is a "must have" or at least a "better to have". It is easier to save money now that I know what to look for. I have a cheap but very good RO/DI, and I have gotten most of my LR and frags from club members who charge me about a 1/10 of what I might pay retail (not that I pay full price anyway, I still get an ex employee's discount at my LFS). Just this week I put up an ad giving away some corals for free in my local area... because I figure I will spread the wealth, people helped me out when I was starting, so I'm returning it now!
At any rate, with the skilter... I think these are beyond a waste of money, they are noisy and do next to nothing. They are constructed poorly. I bought mine "like new" from a garage sale for $10, and figured it was a bargain either way... wrong! I wouldn't take one if someone gave it to me for free now. I only feel bad for people who paid full price for a new one. I ended up using a Prizm skimmer for my octopus tank, which I think was better than the skilter, but it still wasn't the most efficient piece of equipment IMHO, wouldn't necessarily recommend it. The one I use now I purchased on eBay for around $55, unfortunately I can't remember the brand, so I can't help you much there. I have heard good things about the Bak-Pak HOB skimmers, but I think these are a little more expensive.
Well, good luck to you & your neighbor! He's lucky to at least have someone trying to help him out. Hopefully he'll see that some things are worth spending a little extra on... though it's worthwhile shopping around in this expensive hobby, too.