Most of them are not that expensive, but you can get a lot of them in cheaper prices. I don't know how many eyelashes a person has. If you want to find out, just ask someone on the street or ask a friend. I am reviewing about 100 different products. I am only reviewing one brand, because there are many other brands out there. It 's a good idea to pick a good mascara from at least two brands, so you can save money! For those of you who are new to my blog, please check the links below. I reviewed the following products: The list of items I used for this review is in alphabetical order (from left to right): Revlon Colorstay Black On Black, Revlon Black On Black, The Make Up For Ever Shadow Insurance, the MAC Shadow Insurance, and the Dior Matte Eyeshadow Oil. Please let me know in the comments how this mascara does for your lashes! A note from me before I started this review: I tried the "black on black" formula and it did not have much staying power for my eyes. I am so disappointed with this one. It is not the best mascara for my eyes because it does not give enough volume and is not waterproof. I am not really bothered by the fact that this mascara makes my eyes red.