Ya know, if some non-appraiser were looking at your question, they'd be thinking that your approach to this problem is to match the results of your appraisal to the "offers", rather than to your data. But I know you don't mean that.
The comparable sales in your Sales Comparison will be demonstrating a value trend if they really are comparable. Sort them chronologically with Sale #1 being your most recent closed or even a pending sale, and work backwards. Assuming you have sales going back 6 months or so, the difference in adjusted prices, if present, will be very clear. If your market really is appreciating, the newer sales will be higher than the older sales. If your market is in decline, the older sales will be higher than the newer ones. You can develop your adjustments, if there are adjustments to be made, by calculating the appreciation rate between the different sales and then use the same rate to bring the more dated sales current to your effective date.
Whether or not those adjustments will enable your contract prices or the 'offers' is unknown. However, those adjustments will enable a current market value if you have enough data and do the analysis properly.
Just be reminded that a lot of lenders don't believe in time adjustments on an appraisal. Sure, the appraiser is the appraiser and they can do their work as they see fit, but they also shoulder the burden of 'selling' their opinion by way of disclosing, explaining, justifying and supporting what they're doing.
Personally, I don't use time adjustments per se. I usually just list my sales chronologically, note the trend, and rank the subject within the indicated range. In a really hot market, my dataset also includes pendings and listings, so I'm still able to bracket.
