Girls, here's the secret bargain of the century!
I'm always on the lookout for a good deal. If a high end product I like has a dupe, I'll always check it out. Sometimes the dupes are just as good or better. Sometimes they stink. But I'm always willing to try.
I don't always use foundation primer. That's probably because the brand I had (Bare Escentuals) just didn't work well for me, and I just didn't want to waste the money on something else that may or may not work.
Lately I've been hearing people sing the praises of Smashbox Photo Finish primer. It's all over the internet as a "must have" and is listed as one of Sephora's top picks. However at $36 for a teensy bottle, I have to say no thanks.

Being in this crazy wicked southern heat, my already oily skin doesn't hold foundation well. So I did a little research on face primers and found a product that is said to be comparable to the Smashbox Photo Finish primer, but for mere pennies.
Behold the Monistat Chafing Relief Gel. I know what you're thinking. This is not a yeast infection cream for your va-jay-jay, even though it's from Monistat. It's actually a powder gel that you can use for your bra line, thighs, or anywhere you have problems with your clothes chafing your skin.

That being said, according to several articles, the ingredients for the chafing gel are very similar to that of the Smashbox primer. The secret ingredient is the silicone (dimethicone). This lets the product smooth over your skin, filling in smaller lines and pores.
I found the Monistat Chafing Gel at Target for about $5 or $6. The other morning, I put it on before applying my foundation. The texture of the gel is very smooth and glided easily over my skin. I did read that it's better not to rub it
into your skin like you would a moisturizer, simply pat or smooth over the surface or your face. My skin instantly felt smoother and soft. I didn't find the product to be greasy at all. After a few minutes, I applied my make-up as usual.
I have to tell you, this product was amazing! My make-up stayed in place all day. The oiliness I usually experience was MUCH less. In fact, I didn't notice any oiliness until the very end of the day. I have a small smile line starting on the one side of my mouth, and my make-up usually creases in there. When using the chafing gel, it did not.
So all in all, I think this is a great primer. Before investing in an expensive brand, maybe give this one a try for yourself. It's a small investment at $5-$6 and if it works for you, you'll be thrilled!