That 4.5 copy of TEC 29 just looks out of place among all those 4.0s. I suggest you let me take it off your hands so you can replace it with a 4.0. It's the right thing to do.
Seriously, you have assembled quite an awesome run of TECs.
Well, according to the census, there have been no 4.0's graded so a 4.5 will do for now
Now go out and add George's 4.0 Tec 27 and you'll be set
No need necessarily to spend 350K for blue. If you are ok with a restored. As expected the UK-Tec has been relisted on the UK-bay.
Link: http://cgi.ebay.co.uk/DETECTIVE-COMICS-27-CGC-4-5-ORIGINAL-1ST-BATMAN-APP-/130466693727?pt=UK_Books_Comics_Magazines_US_Comics_ET&hash=item1e606bc25f
Close to 100K asking
What about that pricetag?
Buy it Now of £50k (currently around $80k) with a make an offer option.
Bought for all-in price of £28.2k/ $45k by Silveracre.
Run a search on Silveracre if you aren't aware of this seller.