There are no tax implications under an asset deal or sale of S-Corp stock. Under an asset deal, the sales price is increased but the cost basis in cash is the same as the sales price, so there is no gain. Under an S-Corp stock deal, their gain on the sale of stock is the same whether they take the cash or pre-tax (reduces stock basis) or leave cash in (higher stock basis) and increase the sales price. There could be a difference under a C-Corp structure for the Seller.

I have not read ^redacted‌ answer. His is likely to be correct. My quick answer is, seller's tax does not change whether seller does or does not include cash in the deal. There are some benefits if C Corp. seller includes cash in a stock deal and buyer increases price for the cash.