[Greer]

DWS, TW and Bilinda all price at $2.99 and above for short stories.

DWS said in his last blog post, "you must price your short story at at least $2.99 no matter how short it is".
http://www.deanwesleysmith.com/

If you want to follow in his footsteps, it might be a good idea to price as he says.
At the same time, I'd add another short story to that 2k one, to make that at least 5k.

The difference between DWS's situation and the OP's is that DWS is a well-known name with a good reputation built over a lot of years. The OP is starting out, so he doesn't have that reputation to trade on. Also, the preview on a 2,100 word story will be so tiny that it will be almost impossible to judge the quality of the writing.