You know, I've had this exact problem too. I said "I need the 430 HPS Son Agro ballast. What is your price." The answer: "$34.50". After a half second of hopeful delirium where I get fantasies of ordering, oh, TEN or so at that price, reality sets in. Too good to be true, I think. I say "The BALLAST. Not the bulb." The answer: "Yes. The ballast. It's a screw in type, and you need a Son Agro ballast to run these bulbs." Gaaaahhhh!!!
Where do they find these people???
Just curious, what is your new price on the ballast. If it's more than $87.50, let me know, maybe we over here in Calgary can send you some at that price. Not as good as $70 though.
But better than $110 which is one price I had found at another place!
The only thing is, I'm a little afraid that the price seems to change a little every time I phone and ask. It seems to depend on who answers the phone at the parts counter and what mood they're in. Maybe even $87.50 is too good to be true. But I can find out for you for certain if you like, just let me know.