I love that shop but I have had that problem before , frankly I think it depends on who is in the store .
Now for those of you who think I may have a beef with this place , I travel the US and started a post called Favorite hobby shops , this was one listed along with hobbywarehouse in Richfield Minn .

When I go to Northern Cal , I often will call Sheldons on my cell before I make the trip , and yes it does go to the answer machine