I don't want to give pricing advice without photos, but I tend to agree with PCB...other than top names, smaller builders usually go fairly inexpensively. That said...patience and advertising can make more difference in a sale like this matter a lot. I do not think a Mikkelsen, even in good shape with quality parts, is likely to go near $1000. Often bikes like this are better as part outs.
While salamdrine above is probably right to say they're the equal of other builders with more branding value, I don't think it means much for your take home.
More often than not, smaller name builders are great deals for buyers.