The answer really depends on what you have. I get many, many emails from people who have quantities of low value bottles. Value range from zero to maybe a few dollars on a good day. I would say 90%+ of what I review falls into this category. In these cases I recommend that you try to sell them locally by listing on places such as Craigslist or Facebook Marketplace.
If you have bottles that you know to be of better quality, you can contact either an auctioneer who specializes in antique bottles or you might choose to attend an antique bottle show if one takes place fairly close to where you live. Shows are a great place to meet with collectors.
You might consider posting a group photo or two of what you have - here on this forum. with photos, someone can better answer your question.