A sales contingency is when you will need to sell your current home in order to close on the house you're offering to buy. Sell your house fast in Phoenix, AZ quick and easy.No Repairs, sell As Is, no realtor or agent fees. Get a cash offer to sell my house fast Arizona! No Costs ☆ Zero Realtor Fees ☆ No Repairs. An agreement to sell real estate, or a purchase agreement, is a legally enforceable document that specifies the terms of a real estate transaction. How to properly fill out the Arizona Association of Realtors Resale Purchase Contract using Dotloop. What are Examples of Seller Closing Costs in Arizona? We can then apply variables like appreciation, rental rates, etc. To come up with a useful analysis.