We're seeing a definite trend toward fashion in carpet. Textures, different types of yarn systems, different colorations, patterns, tone-on-tone prints, looped carpet, tip shears anything that has interest or fashion seems to be very accepted.
If your carpet need replaced, don't offer buyers an allowance. Do it yourself before you show the property. You'll reap the rewards in selling price and in fewer days on the market. Home Staging: The winning Way to Sell Your House for More Money by Barb Schwarz