I played the Scandinavian as a child, but when I realized I was scoring 80-90% against it as white, I gave it up.  I use lines that world champions used against it, including 2...Nf6  3. Bb5+ (Fischer: trust me he played it for a good reason, and I've got analysis in one line that dates back to Staunton).

More on point against 2...Qxa5 I've played 3. Nc3 Qa5  4. Bc4 and 5. d3 a la Capablanca.  A quick Bd2 is often in order, and then, even if Black has played ...c6 for an escape route for his queen, if he has also mindlessly played the automatic ...Bf5, then Nd5-e3, followed by f4 (Nf3 is deferred) is problematic for Black.

Curiously I've also tried the 4. b4 line.  But differently than the other suggestions on here.  Notice Black's queen ends up back on ...Qd6.  Well I've countered with Ne2 and Bf4.  It's recognized as being the refutation of the 3...Qd6 line, and maybe worth a try a pawn down in the 4. b4 line.

The key things in a lot of these lines that I've learned for White is that there is no rush to bring the king knight out.  Sometimes Ne2 is better, sometimes it's better to get in f4 first.  And oh yeah, one time I was glad that I deferred Nf3 cause my queen went there in response to Black's setup with ...c6 and ...b5.  Wasn't my opponent surprised when I chopped wood on b5

it slightly amuses me that when the subject of the Scandinanvian comes up, gjempty throws his toys out of the pram and starts abusing everybody. In response to I like the dragon's question, 4...Qxb4 5. Rb1, and then something like Nf3, Bc4, 0-0, d4, and attack down the b-file. I'll look it up in my book on the Scandinavian and give the forum something concrete ASAP

I quite like Nigel Davies's idea. Why play d4 and give black a target? Bc4 and d3, leaving black with a development problem and nothing to bite on, seems quite good. I refer you to his analysis for more instruction!

Besides, 3...Qa5 4. b4! is a great gambit which I still score 100% with! 

Regards, 
Craig

That is also what I play against 2...Nf6.  However against 2...Qxd5  3.Nc3 Qa5  4.d4 Nf6  5.Nf3 black can play 5...Bf5 and only then play ...c6.  What do you think of that? ???

Thank you, gjempty, for offering the advice of playing as black; any and all advice is appreciated.
However, could you please try to address and/or attack the subject without attacking the individual? If you would care to re-read both this thread and the Patzer variation thread you might then reallize that I indeed did NOT make contradicting statements! I have not ran into the Scandinavian a great deal! In fact, I have only faced ONE opponent who uses it against me; and he has used it against me NUMEROUS times! And to boot, the exact 8 move order has indeed been repeated NUMEROUS times!-Try commenting on only things that you know, and leave the rest alone!
From your analysis of people, I can only assume that you know very little on the subject. But from your analysis of the game of chess, I can clearly see that you have valuable knowledge that could benefit others. So, I ask that you try to quit analyzing me (I'm not a troll) and instead offer some helpful advice.
Could you tell me whether 2...Qxd5; 3.Nc3 truly has potential for gaining in developement and if so, what lines are the best?
Thanx

Thanks for your input.  By 2.ed I meant 2.exd4.

I've often played against the center-counter in tounaments but sometimes my opponent blunders his queen!  But anyway I was wondering whether the gambit (1.e4 d5  2.ed Qxd5  3.Nc3 Qa5  4.d4 e5!?  5.de Bb4  6.Bd2 Nc6) was considered playable by black.  I aslo was wondering if it was only played to win the exgange with a trap (7.a3 Nd4  8.axb4 Qxa1  9.Qxa1 Nxc2 and the knight can be trapped but not recaptured.)  If anyone has anything to say please do!