Set up merchandise in Config.Items. Items of type weapon give weapons; type item uses the amount field. Valid currency values are money or black_money.
Dealer spawn points are defined in Config.SpawnLocations; each entry can include vehicle, dealer, and bodyguard positions.
Next steps
Add the blackmarket_tablet item to your inventory (see items.md) and include the icon in your inventory image folder.
Configure the products in Config.Items and ensure every weapon/item exists in your inventory system.
If you use a custom notification system, uncomment and adapt the appropriate line in Config.SendClientNotification.