The only bike I bought new was my first, at 10 yrs old. Many used since then, & no real problems, but I am handy & mechanically inclined.

The Pro's Closet tends to sell stuff that has actually been used, but in the bigger picture

bikes are often like other exercise equipment- bought with good intentions & set aside.

A good profile to look for is private party seller, several years old, little used, & 1/2 the price of new, IMO.

We live in a world crammed to the gills with stuff, so there's not much need to buy new.