Thanks Scott,
This is how I am getting it to work (so far
I'll try to state details in case someone else in the group wants to do the same. My main objectives are to be able to input my cost of goods when listing so I don't have to do it later, and get a total Cost of Goods Sold and Current Inventory Value at year end.
If you have an eBay store, the listing form has an area where you can add your Custom Label (SKU). Unlike Amazon, with eBay your SKU's don't have to be different for every item so if I bought 5 books at the Goodwill on July 4th for $2.00 each, all of those books can have a SKU named 2.00-GW-07.04.2017
So I created a new sheet at the end of the MyCostPro workbook and named it Inventory on Hand. I updated my Active Item List, copied the blue Listing section (which includes the SKU I entered in eBay), and did a Paste Special into the new Inventory on Hand sheet. (The paste special just pastes the static data without formulas). I added 2 columns, one for supplier and one for purchase date.
After doing a bit googling I found if I entered this in the COGS column (with G3 being my SKU column):
=LEFT(G3,FIND("-",G3)-1)
it would grab anything before the dash from my SKU (which is my cost) and then all I had to do was drag the formula down and all of my costs were pulled from my SKU and entered instantly. It can do the same for supplier (using MID=) and purchase date (using RIGHT=) which is why I put dashes in my SKU to separate the sections. Now on Dec. 31st or Jan 1st all I have to do is do what I did above, SUM it up and I have a total value of Inventory at year end for Uncle Sam. Sweet!
I also tested this on the Sold Items List for Cost of Goods and it worked there also. If you could add a Supplier and Purchase Date column to the sold items list then that would be complete and you'd be able to get a good overview of your best suppliers and how long items take to sell.
Obviously, this wouldn't work for everyone if they already had different SKU systems in place. But my bet is most small sellers haven't even used the SKU option in eBay yet.