If it's that cheap, and you need a noise suppressor, get it.
20 bucks isn't taking too much out of your ISP budget, and you could sell the rocktron later on.
Call me Wes.
Fender American Deluxe HSS Strat
Chicago Blues Box Roadhouse
Bad Cat Cougar 5
1957 Gibson GA-5
Ceriatone 18w TMB Combo
Hughes & Kettner Tube Factor
Various Ibanez TS9s
Weber MASS Attenuator