Acceptable to ask seller for option to return a component?

Thanks everyone for the great replies, which seem to reflect both sides of the meter - OK to ask and not OK to ask, although most seem to favor asking. In my particular case, I did offer to pay for the return shipment, but did not consider a sellers concern for potential damage to a unit, as onhwy61 points out.

So far, my take-away from responses is its OK to ask, but most sellers will likely say no, so if you move forward make sure you use a protected payment in case of dispute, and know the resale value of the component if all goes awry. 
 

Good idea...get some speakers for a party and after words just return them..

If you want to buy used with a return option, buy from TMR. They are good people. 

I have a lot of transactions here under my belt and only one time did the person as if they could return the product.  This was a pair of speakers that the person bought 6 months earlier.   He said he just didn’t like them.  I tried to be polite and told him I wasn’t a business and if he didn’t like them to sell them.  He still persisted so I pretty much told him to go pound sand.  He then tried to  change the positive feedback he gave me 6 months earlier to a negative one.   What gall to think I was going to give him his money back after using them for 6 months.