This is an A Beardsley oil painting titled Shoreham Harbor, valued at 700 to 900GBP resale.
Here are suggestions for selling online- GoAntiques.com, Truegether.com, Mercari.com, Wanelo.com, Poshmark.com, Bonanza.com, Etsy.com, eBay, Pamono.com, and Chairish.com. For the UK, selency.uk, loveantiques.com are good sites. For CANADA, kijiji.com is the most popular.
Facebook Marketplace is how most people post things for sale locally. Here are other local online classifieds where the buyer picks up from you- Webstore.com, Varagesale.com (local), and letgo.com (local), and 5miles.com (local).
Use invaluable.com, liveauctioneers.com, or auctionzip.com and search their directory for an
auction house near you and consign to them if you don't want to do all of the work of listing and dealing with sellers.
Do go to the justanswer.com website (if you are not already there) and
click the five stars next or WRITE THANK YOU.
You have to rate me for this answer (it is the only way the site pays me for my work)
then start a new chat with HI RAREWARES I HAVE ANOTHER ITEM as title.