For example
Acoin Cryptocurrency can be mined with a normal bitcoin asic miner since they share the same Hash Algorithm . and so on .
also , there are some other kind of Asic miners which have a Scrypt algorithm , do they obviously mine XMR / DogeCoin / any Scrypt coin ? .
else where can i buy Scrypt miners / Asic SHA-256 Miners from ?
Overall , are altcoins worth being mined with ASIC miners ?
I'm waiting for experts to provide simplified answers to my noobish questions , thank you
For bitcoin miners the only left company selling AFAIK is Bitmain:
http://bitmain.com
Spondoolies-Tech and KnC were also good manufacturers of bitcoin miners but they closed their businesses. Though you can still get used miners, here or on ebay.