A day where we can celebrate our favorite mathematical constant – yes, please. It is 3/14 and in honor of Pi day, ThinkGeek has 100 items for $3.14. The Half-Persian Chainmail Bracelet Set pictured is included in the $3.14 sale (Reg $29.99). Shipping will add around $6.24. Plus, you can save an additional 20% off $40+ purchases with code PINSTEIN. Deal expires 3/17.