The subject bicycle is a 1987 model not a 1986. It may have been built in late 1986 but it is definitely a 1987 model, as New 105 came out that model year.
While I don't follow prices closely, IMO this bicycle should be going for close to $300. Based on what I've seen on this forum lately, that seem to be the going price for a comparable condition Centurion Ironman Expert which is very similarly spec'd model. The only drawback that I see to selling this bicycle might be the colour scheme. The pastel green and pink might not appeal to the average American male these days and it's far too big for most females which might be more attracted to the colour combination.