I had to say shipping in 30 days and then tell them the real deal via email or phone and see if they were ok with it. Paypal has to be done in two transactions if over 10k. Works just fine for me.
I get that, I had done the same and almost a month later ebay and Paypal reversed it since I couldn't meet the delivery timeline set in the auction, since it was over $10K they actually flagged it for follow-up.
I hope it works for you, I was curious to see if you navigated the waters any different than I did..