Grep to find price duplicated?

Any GREP gurus help  me with the following

If the price is 100.00 followed by a tab and 100.00

That's what I want to find

1247.00 \t 1247.00

120.00 \t 120.00

10.00 \t 10.00

etc.

Basically if it's a number followed by two digits separated by a tab with the same number after the tab - that's what I want to find.

Any ideas?