[jplarson]

Check to see if Beckett has ever published multiplied for cracked ice parallels in past years rookie autos. If so I'd use those as guidelines. If not what I would do then is find some <b>sold</b> cracked ice parallels on ebay and add them to a spreadsheet. Then look at what base versions of the same player have sold for. Then divide the cracked ice sale by the base sale to get a quick and dirty multiplier. Do that for several of the same player and average it. Then grab a couple of mid-level or common players and do the same thing. See if a pattern emerges for a multiplied (think bell curve or scatter plot). Then use that as your guideline.