Modest
Part of speech: adjective
Definition: Not bragging or boasting about oneself or one's achievements, unpretentious, humble. Small, moderate in size. (especially of behaviour or clothing) Avoiding being sexually suggestive.
Example sentence: Oh my goodness gracious, what you can buy off the Internet in terms of overhead photography. A trained ape can know an awful lot of what is going on in this world, just by punching on his mouse, for a relatively modest cost.
Unpretentious
Part of speech: adjective
Definition: simple, humble, not pretentious