Budget tip: Glass Nail File from Ebay

I recently bought a glass nail file on Ebay. I know that you can buy nail files at every drugstore, but I just wanted to try one on Ebay since it's inexpensive ^__^. It comes in many colors and I received a yellow one from the seller. I've tried many different kinds of nail files before, like nail files made of emery paper, ceramic, metal et cetera, but we all know that glass nail files are the best for our nails.

Glass nail file advantages
One of the top advantages associated with this product is the life span in which it can be used. You can use it over and over again and it can be easily cleaned and washed. It's suitable for natural and acrylic nails. Nail files made of steel typically cause the nail to chip or to crack because they are too rough on the nail. Glass nail files, on the other hand, help reduce the amount of chipping, splitting and peeling! Also, it won't become worn down that easily like emery board and metal nail files and it creates and leaves a soft and smooth finish.

Price
I bought it on Ebay for $0.99 (€0,70) from seller Edeal8 and the shipping is FREE. It even includes a sleeve to keep the file protected.

Appearance
It has a rough surface on both sides much like regular files. The yellow part doesn't have a rough surface which makes it more comfortable to hold while filing your nails.

EDIT:
It remains good longer than a cheap nail file which isn't made of glass. However, this one from Ebay aint that good after all. It's worn down quickly (probably a month). You can better invest in a more expensive one, than this one from Ebay