That was overpriced.
For comparison, technobit completed 8 chips miner price is 758 USD.
Assembly serviced for 8 chip miner is 289 USD.
Then the chip price is 758 - 289 = 469 USD for 8 chips. So each chip only 58.6 USD.
Yours is 87 USD.
That is true, but that was just the going rate for the chips. But it still could be a good price for those already with some hardware for the A1 chip.
And it is OBO so I am open to any offers.