Epson - 98 High-Yield Ink Cartridge - Black

It is the same.

As far as I know each Epson Artisan printer uses a different number ink cartridge. I have an Epson Artisan 810 and the only ink cartridges that can be used in it are the Epson 99 standard capacity and the Epson 98 high capacity cartridges. My sister has a different Epson Artisan and it uses different number cartridges. I suggest you check your user manual to see what ink cartridges should be used in the Artisan 50 printer.

Best Buy have some

I would be surprised if it did because this product is for an Epson printer. Normally inkjet cartridges from different manufacturers are not interchangeable.

Yes, I have used this ink with Copic markers. I use regular cardstock.