Hornblasters shocker for $40

Was looking for horns on eBay and came across a single shocker XL bell for $10. I went to the guys page and found all 3 other bells for also $10. I bought all 4 for a little over 50 bucks (including shipping and stuff) bought some hardware for it from the Hornblasters website and Home Depot and I now use it for the Roswell Hornets touchdown horn with a ball valve. Sounds great and goes great on Friday nights.
Thoughts or suggestions?