There are more and more coffee drinkers. Ever go to a college town and notice all the coffee shops, very popular with younger crowd that will most likely be coffee drinkers for life.

Is there a market for private label coffee? yes very possibly although flavors probably are similar to what is out there already. One thing that sways purchasers is the package design and labeling.

2 examples I can think of where fancy bottles and labeling sell a product probably no better than cheaper brands are
Sammy Hagar Cabo Wabo tequila. Average tequila but has celebrity name and fancy bottle with a very high price tag.

Other product is many of the bottled waters, many have mountain spring in the name giving impression of purity. Purified water with fancy name and label sways buyers to pay more.

So in closing is there a market for private label coffee, you bet just have to get creative with name, packaging and promotion. Of course coffee flavor has to be appealing.