I am reading an essay by Alfred F. Young right now in which the author mentions that Gouverneur Morris said of enfranchising those without property:

Give the vote to people who have no property and they will sell them to the rich who will be able to buy them.

I find the concept of selling votes to be interesting, and I imagine that different elections would have different prices for which votes would sell. I have not been able to find any information on what the range of prices for votes would be, and it seems like a very difficult thing to put a price on. Is there any literature available on the prices which would have been payed for votes in various elections in the period?