I bought a car online - they took a 1k CC deposit. They didn't want to take more but I didn't really press them too hard - used a cashiers check for the rest of the DP and pre-approved financing for the rest. I did get outside financing for ~20 months rather than pay cash so I have the flexibility to pay utilizing manufactured spending techniques (VR, etc) to make the monthly payments or simply pay from my bank account. Works well since I'm able to hit spending minimums on new cards and not simply load up an existing card and further bolster my credit with an installment loan. No reason not to IMO with interest rates so low (and other investment opportunities)