Depends on the sales comps. Comparable sales for the last 90 days are all that should be taken into account. If you have to open up the geographic area to get at least 3 comparable homes sales in the last 90 days, then do so. But, don't go back in time. The market is different this Spring than it was last Fall or Summer. Your comparable sales should be current to 90 days old only.
If the home is priced to sell, your cash offer better be high enough to make the seller feel it's attractive. 100% of asking price may be a real value if the comps reflect that the home is priced right. Be careful falling into the trap of cash offers netting you a huge discount. It isn't always the case. Yes, your home purchase won't be contingent on the sale of another property, and it won't require financing approval. That's why cash is king. But, if the offer doesn't net a desirable result for the seller, they will counter or pick someone else's offer while you're trying to steal the house. Keep in mind, at closing and funding, when a home is sold for a positive gain, the end result is still cash to the seller. How they get it factors in, but isn't a set in stone rule. It just takes some of the tentative nature of the contract off the table.
Have a blessed day!