Empty HP 970 and 971 Ink Cartridges for refilling XL and Setup

Description

I have shut down the business I had that used these ink cartridges.  I used to refill these things over and over again to save a ton of money on buying new ink cartridges.  I no longer need these, and I thought someone else out there might have some use for them.
I will also be throwing in the refill syringes, ball plugs, hole plugs and hand drills I used to use with these.  Basically, that's everything you would need to refill these cartridges on your own.  You can find Ink Tek refill ink here on eBay by the liter for use in these cartridges.
Some of the cartridges have holes (with plugs) drilled in the back that I intended to use as a CISS system, but I ultimately found it was just easier to pull the ball plugs from the chip side of the cartridge and refill from there.  Either way works.
There will also be some CISS supplies if you care to build one of those systems.
Anyway, if you print a bunch on HP Pro x451dn, x476dw, x551dw, or x576dw printers then you know how pricey the ink can be.  This is a very simple way to hold those costs in check AND ensure you always have plenty of ink available.
In total, I have 10 yellows (all empty), 5 blacks (all empty), 7 cyan (feels like 5 empty and 2 full), and 8 magentas (4 empty, 4 full).
Short version is that I don't need this stuff anymore.  I would prefer to sell it to someone who can actually benefit from it.  If it doesn't sell within a couple weeks, it'll probably just get thrown out as dumpster bait.  Feel free to make an offer.