300 square feet tiled in :
Vinyl starts under $1/sq ft
ceramic starts at $4/sq ft for flooring
Stone $10/sq ft if you're not being picky.
plus the cost of preparing the room to accept flooring (what flooring is there presently?)
installation starts at $20 for the cost of buying the tools and printing out step-by step to lay the peel-and-stick vinyl tiles over an old linoleum floor in good condition up to $5/sq ft for 'standard' installs.