Smart thinking.

Thats a good idea. I'm basically doing the same thing though because I REALLY want Marshal or Ruby. I just got Julian yesterday and he filled up my town. Sadly enough Ruby had to be camping in my town after the fact Julian moved in (which I am happy about even though he didn't move in a good spot.) So I've seen them sell for like 100-150 TBT bells, and I'm working my way up there. For crying out loud I made my account yesterday and I already have over 50 TBT bells so this should be really easy. But 20M for 100 TBT? Wow! 20M is like my total savings on AC:NL! (But then again I did only get it this Christmas)
I still want to pay though because even something as low as 50k IGB helps you like 0.1%! XD
Oh and if you are set on trading, do you want to do my town? I know I only have one rating, and you have like 52. So maybe you'd feel safer if it was like that? But all I ask is that you grab what you need and head back to your town. I would plant your hybrids close to the train station too.