Do most collectors here find Cas coins to have more value if they are slabbed (graded)? Also, on a side note, does anyone have recommendations for grading 1BTC and higher Cas coins? Would it be better to just do it in person at the grading company HQ? I would not feel comfortable sending a 10btc Cas anywhere at the current price. Thanks.
Graded is definitely helpful when selling, more so with a lesser known seller. Besides giving an indication as to the condition of the coin when slabbed, It also shows that at least since the coin was slabbed it has most likely not been handled or exposed to contaminants.
For grading 1 btc and above I would just fly to St. Pete, Florida and have them graded by ICG in person.