You'll need to install the eBay Python sdk from timotheus which is easy enough on unix systems. Additionally, you need to register with the eBay Developer Program to receive your keys (add these to your eBay.yaml file)

Additionally, for this set-up to work, you'll need:

• an empty txt file called ignored_listings.txt
• parent folder called sensitive_files that contains
  • ebay.yaml (see Timoetheus)
  • email_code.py

To run a script at a frequent interval, check out cron on unix systems (just remember, eBay limits you to 2,500 finding calls a day!).

Pricing items on eBay at a reasonable price is fairly easy. Just browse recently sold items that match your item or use eBay's trending price tool. However, often sellers sell their items drastically lower than market prices, giving resellers arbitrage opportunities. A script like this can be used to frequently query for a particular item below a particular price point.

eBay has a saved-search feature that allows "real-time" notifications, but it only alerts once daily (way too slow for most items). Using the eBay SDK gives you much faster notifications and allows you to save and track listings. The latter is especially useful for looking for seasonal variations in price and volume (another arbitrage opportunity, albeit with more risk depending on the holding time) and for building new models that use NLP and/or image recognition to better classify products.

https://public.tableau.com/profile/lucas.aleck#!/vizhome/MP2_15625587782040/Dashboard?publish=yes