Hi
The one thing I have too have had trouble is the search function. You have to be specific! The way I have found to get around that, and something I do anyways when listing new cards is to two sportlots window open, as well as, the Beckett price guide open.
You don't have to be a member to use the price guide. I have baseball, but I still use it for the other sports to figure out what cards I have really are.
In other words, I was listing some of the Topps numbered to 150 of the 150th year of baseball. But some are 2018 and 2019, like. I have Mel Off SS6. I type Ott SS6 in Beckett search. And, get about 6 different possibilities of 2019 Topps 150th statistical season SS6. I have the one numbered to 150. I either cntl F or scrolled to print run 150. That give me what Beckett thinks the card should be called!
I then have my first sportlots page opened to add to inventory. I enter the year 2019, I select Topps as brand and baseball. Then because I a couple thousand cards listed, I have several different names for the box the card is going to i.e. I have a box called Her for Heritage, and a box for older cards called Old, ETC! The default for price is $0.18, so don't plan to list your 1987 Donruss here! I hit next and that brings up every 2019 Topps set that came out in 2019. I then cntl F to and cut and paste from Beckett and search. You won't always find it exactly the same, so you cut it down to just statistical,which highlights all the statistical in the list and find the set that way.
After, that I hit page down and insert, which brings up all the cards in the set and scroll down to Topps Statistical Season150 Anniversary SS6 Mel Ott. I enter the number I have c the card,usually 1. I then move on the row to price, which at this time says $0.18 and look at the next column that tells me how many copies of said card are already on the site.
If the number is 0, cool, nobody else has the card listed and I can change the $0.18 to whatever price i want to sale of for!
But, if there's a number showing how many have that card, I highlight the card information and go to my other opened sportlots window and paste it in hit enter. This will bring up the card and show the lowest price of the card. If you hit the plus sign, it shows the ten lowest. Then determine your asking price. If there's 1 person asking $0.18 and second lowest is a $1,I can ask $0.95, because if the $0.18 card sells, I'm next lowest.
In addition, you can put your account on vacation hold, which I did until I had over 2,000 cards listed before going live. You will want to this, as sportlots has a bizarre sliding fee schedule. The more you sale, the lower the percent of fees come out.
There are also tutorials to help you buy and sell. And, I highly recommend Mike Sommer's Waxpackheroes.com website for his blogs and podcasts where he has many interviews, including recently one with sportlots owner and also many that explain the in and outs of making money in the hobby, including several on selling on sportlo, COMC, Facebook and eBay. If you join his free site just let him know you were revered by gwynn_fan.
If you need more help, you can PM me.
Hope this helps, it could be a little confusing, because I'm writing this on my Fire at 0430 to 0530, after big to bed at 0230!