Re: bike missed first service- how bad is this?
While in my opinion the first oil change is most important, I doubt it will hurt the long term durability. Use this as a bargaining tool to buy the bike, get it home, and immediately change the oil and filter. Only use a good filter BTW, Honda brand filters and Purolator are good, I like K&N's too.
BTW, if you change the oil the first time, don't be alarmed if the oil comes out looking like bassboat metallic paint from suspended metal particles. That's normal for break in oil.