Mystery DEC backplane on eBay

[Guy Dunphy]

At 07:30 PM 16/07/2019 -0400, you wrote:
>For those who saw this item:
>
>  https://www.ebay.com/itm/183639487495
>
>but didn't know what it went to (Web searches for "5409818" and "5009817"
>didn't turn up anything useful for me), it turns out to be a "Configuration
>2" backplane for a PDP-11/05-/10:
>
>  http://gunkies.org/wiki/PDP-11/05#Backplane_versions  
>
>with slots for one MM11-L memory unit, and 4 SPC slots.
>
>	Noel
>

And what is this:  ebay 273920073404
  https://www.ebay.com/itm/Storage-Expansion-Boards-Backplanes-for-DEC-PDP-8-I-Rare-Vintage-Computer/273920073404

I see a lot of flip-chip modules with numbers the same as in my PDP 8/S.
If it wasn't for the shipping costs for a big thing like that, I'd bid.

Guy