AGon is a 1B/DH only, so would have to be putting up huge numbers to have any value in a trade. Reyes, as poorly as he has been hitting is still a player with multi position ability and only needs to show he has his head right and you will get something in return for him. Not a huge return, but if you are able to get a young minor leaguer, then you never know how they may develop.
"Always look on the bright side of life!"
Eric Idle