Hello and welcome.

There are three reasons why you might want to get your coins valued. The "value" answers given will be different in each case, so we'll need to know which category you're in before we can help you very much.
1. You want to sell your coins, right now. In this case, an old maxim applies: "a coin is only worth what someone is prepared to pay for it". It doesn't really matter if the "book value" of a coin is, say, $50; if nobody is prepared to pay more than $20 for it right now, then it's "resale value" right now is $20. Recent prices realized from coin auction houses or
ebay are a reasonable indicator of this.
2. You need to know current market values for reasons of your own (for example, if you are the beneficiary of a deceased estate, or even if you're simply curious about some old coins you've found) but do not actually plan to or wish to sell them right now. In such a case, the "book value" from a website or coin catalogue should be sufficient, but understand that "book value" and "what people are actually prepared to pay" may be two quite different numbers.
3. You plan on keeping the collection but need a valuation for insurance purposes. In such a case, I'm afraid we're not qualified to give you that; you're going to have to find a coin dealer recognized by your insurance company that does insurance valuations, and pay them to do a formal valuation. Values given by a bunch of anonymous people on the Internet, however knowledgeable they may be, are not likely to count for much with an insurance company.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis