The value of Diaclone Transformers?

First and foremost I’m not sure if there’s a specific part of the forum reserved for price checking, apologizes in advance if this is not the place!
So, I have a Dia Attacker (who I only recently discovered was called Dia Attacker) gathering dust; he’s missing just about everything he could possibly be missing but is otherwise in pretty good condition, with some chrome wear here and there, tight joints and no broken parts.
So I put him on ebay hoping to get a couple of pounds.
The problem is, I have no idea what the going rate is for him or any Diaclone in general, so can anyone enlighten me.
What demands the big bucks? Are Diaclones that went on to be used as Transformers worth more than those that didn't? and what, if anything, is a nudey Dia Attacker worth?
So, I have a Dia Attacker (who I only recently discovered was called Dia Attacker) gathering dust; he’s missing just about everything he could possibly be missing but is otherwise in pretty good condition, with some chrome wear here and there, tight joints and no broken parts.
So I put him on ebay hoping to get a couple of pounds.
The problem is, I have no idea what the going rate is for him or any Diaclone in general, so can anyone enlighten me.
What demands the big bucks? Are Diaclones that went on to be used as Transformers worth more than those that didn't? and what, if anything, is a nudey Dia Attacker worth?