FYI - correction: the price for MS70 American Silver Eagles from oher sources are typically the same (or more) than the price at Numis Network.
The key is who grades the coin, ANACS, NGC or PCGS. It's confusing because the 3 top grading houses have different prices.
ANACS is the oldest grading house. Their coins typically sell for more than the others. When comparing prices you must compare ANACS to ANACS, NGC to NGC and PCGS to PCGS. if you don't you are misleading yourself.
Coin dealers like NGC (because they buy their coins cheaper from them) and will usually bash ANACS. The truth remains, ANACS is the oldest. I've collected coins for years and have found that buying ANACS coins gave me a higher resale.
Also, Numis Network is the only source of MS70 coins who has a 5 year 100% buy back guarantee. You get what you pay for.