Definitely looks like a fallow. I know how you felt when you saw him - I did the exact same thing! I saw a young hen that I thought was a lacewing, bought her, only to find out that she's a fallow, which is even more amazing!
You know you might have too many budgies when you're not sure if you've remembered them all!
Charlie - Cinny - Dante - Gidget - Jimmette - JJ - Jules - Mo - Ollie - Peanut - Penny - Pie - PJ - Pockie - Sally - Simon - Snowy - Song - Sora - Spang - Tommy