Goldblatt G05850 Blue Steel Taping Knife, Neon Handle, 10-Inch Price: $1.45(eligible for free shipping with Amazon Prime)
Can be found HERE
Pretty Hot! Regular price is somewhere around $10.
For some comparison the same model 8" knife is $9 and the 12" knife is $12
If you want it click through quick. Similar deals sometimes expire in a matter of minutes.