Before you conclude any sale of your business it is best to make a complete assessment of your tax liability before you conclude the deal. Remember that the buyer has equal interests in the matter as the figures you allocate to capital and ordinary assets have to suit him for his requirement to carry the business further. All these figures have to pass IRS scrutiny and be accepted by the tax authorities before they can become a part of the books of the buyer and your liabilities for tax to you as the seller.
So plan for quite a few meetings between you, the buyer and your respective business advisers. You can defer the receipt of the total capital gain and take it in installments. This is called seller financing and even here there are limits to what the IRS would accept. This deferment can only be made for capital gains and is not applicable to ordinary income from the sale.
Once you have decided on the sale and the figures for it, both you and the buyer would have to complete the required paperwork for the IRS and ensure that your figures tally with each other, otherwise this could lead to complications.