Telemarketers are usually very close to minimum wage workers, not sure how much an ecomm company can make from that market segment. But ... go for it.
I love telemarking sales calls, if I am at the office and its an SEO firm calling I give them Redz's number and tell them that is our SEO office and they would love to hear from you.
At home, if its a female telemarketer calling, I ask what she is wearing ;-). If its a male telemarketer, I ask if there are any attractive women in their office and to describe what they are wearing. One time I heard the guy getting yelled at because he was describing his co-worker, then he quickly hung up.
Amazingly, these tactics have reduced my calls. They must have a list of numbers not to call again in the future.