op you should better go for altcoins as it save both time and money.you can buy scrypt/sha256 ascii miner from amazon but do not think of mining bitcoin or litecoin ,they both have huge worker ongoing.so you will only waste time and money.you can also try gpu mining for cryptonite and x11 algorithms,they also give better result.
Just to let you know anything mining in altcoin will also not add any value. Because daily there are altcoins come and and the next time you hear their name is the closure time of theirs. O may be they may be there for some time and will have the value next to zero in coming time. So need to be careful about the selection of alt coins too.
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