Michael Vick -- Jersey Number Could Be Huge Problem in Negotiation wi

Michael Vick knows his price ... and it might be way too high for the NY Jets ... because he wants the jersey that belongs to the current starting QB -- and it's gonna be an issue during negotiations, TMZ Sports has learned.

Sources close to Vick tell us ... Mike is very serious about rocking #7 next season, no matter which team signs him.

Besides the fact he wore #7 in college and all throughout his pro career, Vick also has a clothing line called V7 -- and he's dead serious about sticking with his number.

Problem is ... Geno Smith currently wears #7 ... and he's supposed to be the QB of the future in NY.

Now we're told the jersey situation is not an absolute dealbreaker -- but it will be a "big issue" in negotiations.

In other words ... No number? More money.

Stay tuned ....