Do-it-yourself telescope kits might be common nowadays, but you'd be hard-pressed to find parts that cost just $1.95. Brownscope's 100x telescope lens kit, which was suited for refracting telescopes, came with two astronomical eyepieces and one polished objective lens. As if you weren't saving enough money by buying an inexpensive lens, the advertisement also recommended making a profit by charging people to look through your newly-upgraded telescope.