Selling value at any point in the game in order to stall time and gain advantage on a racing level is forbidden.
This rule is there for the abuse of clogging/suiciding, but I think this is an extremely poor rule (if only because no one can look into the future and know whether it will be a race or not) and it won't be in the tournament. So I am thinking of scrapping it completely or replace it with a rule that better catches the 'spirit' of this rule, namely:
"You cannot sell units for the purpose of suiciding and/or clogging."
I will follow the majority on this one.
PS the rule will either be about both suiciding and clogging or none, because it will leave too much room for discussion if selling for suicide is only okay if there is a possible holder, et cetera.