i dont think that's the best use of our money.Players from Chelsea have been signed by us, and played well for us.
Maybe not recently with Cech, Luiz and Willian (though I think Luiz was somewhat decent, especially in the FA cup win) but Gallas (bar getting 10, and pre Birmingham) was very good for us, while Benayoun you could argue never had a bad game here...it's not a death sentence to sign someone from a rival, maybe not someone on their 30s though, that increases the risk tenfold.
Our fans aren't expecting him to be Drogba, and if they are then they are being kinda dumb...but he is a good young striker, who has potential, in a market that doesn't have that many great options and at a time when we probably can't attract great options either...if everything works out, this good be a very good deal for the club.
Since we dont have unlimited resources, signing Abraham would mean losing the option to strength other positions.
Our problem is finishing or creating chances? i think the latter one.
How much Tammy finishing ability or creating chances is better then Martinelli for example?
if it was a Van Persie type of player im all for it.
full disclosure, i watched Tammy limited amount of times, i based much of my opinion on YT and other forum members.