Would you like a nice paperweight?
I had a seaclone... hated it... returned it straight away. Some people like them, some people say that they're good but require a lot of upkeep (like daily fine tuning). Most people say the same thing about prisms as well. I wouldn't skimp on the skimmer... but that's just me. It's really up to you.
A Seaclone will already set you back at least $100 if bought from an online dealer, so why not spend $200 for a quality skimmer that's tried, tested, widely approved of, and will save you hassle? $200... that's like... one starbucks latte twice a week. Or one combo meal at McDonalds once a week for a year. I could throw that into a tank easy